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Synthetic systems cannot easily mimic the color-changing abilities of animals such as cephalopods. Soft machines--machines fabricated from soft polymers and flexible reinforcing sheets--are rapidly increasing in functionality. This manuscript describes simple microfluidic networks that can change the color, contrast, pattern, apparent shape, luminescence, and surface temperature of soft machines for camouflage and display. The color of these microfluidic networks can be changed simultaneously in the visible and infrared--a capability that organisms do not have. These strategies begin to imitate the functions, although not the anatomies, of color-changing animals.
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http://dx.doi.org/10.1126/science.1222149 | DOI Listing |
Chem Commun (Camb)
September 2025
School of Intelligent Manufacturing, Jiangnan University, Wuxi 214122, P.R. China.
Electrochromic devices (ECDs) hold great promise for applications in displays and smart military camouflage. However, achieving different electrochromic colored states with compatible integration into a monolithic device remains a significant challenge. In this study, we realized effective color modulation of ECDs by tuning the solvent composition, leveraging the effects of solvent polarity.
View Article and Find Full Text PDFEcol Evol
September 2025
Department of Neuroscience, The Mortimer B. Zuckerman Mind Brain Behavior Institute Columbia University New York City New York USA.
The dwarf cuttlefish, (formerly ), is a coleoid cephalopod like octopus and squid, and an emerging model organism for scientific research. Dwarf cuttlefish can change the color, pattern, and texture of their skin in milliseconds to camouflage with their surroundings and communicate with conspecifics. Their skin displays are directly controlled by the brain.
View Article and Find Full Text PDFMikrochim Acta
August 2025
Analytical Chemistry Division, Department of Chemistry, Faculty of Engineering, İstanbul University-Cerrahpaşa, Avcılar 34320, İstanbul, Türkiye.
There is a need for on-site applicable, simple, cost-effective, and rapid methods for the remediation of 2,4,6-trinitrotoluene (TNT)-contaminated soil and groundwater in military storage and reclamation sites, which necessitates extensive analyses to monitor remediation. Here, α-MnO@EDA-based colorimetric methods were developed for the rapid, selective, sensitive, and on-site determination of TNT. α-MnO@EDA, synthesized by passivation with ethylenediamine (EDA) of MnO formed from permanganate with thiosulfate reduction, produces a colorimetric signal by entering into a charge-transfer interaction between the electron-rich amine groups in its structure and the electron-deficient nitro-groups of TNT.
View Article and Find Full Text PDFPolymers (Basel)
July 2025
Key Laboratory of Functional Materials and Applications of Fujian Province, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China.
Electrochromic devices (ECDs) capable of modulating both visible color and infrared (IR) emissivity are promising for applications in smart thermal camouflage and multifunctional displays. However, conventional transmissive ECDs suffer from limited IR modulation due to the low IR transmittance of transparent electrodes. Here, we report a reflection-type electrochromic zinc-ion battery (HWEC-ZIB) using a self-doped polyaniline nanorod film (SP(ANI-MA)) as the active layer.
View Article and Find Full Text PDFWith the rapid development of infrared (IR) detection technology, the demand for IR camouflage in military reconnaissance and civilian fields is increasing. Although low-emissivity materials can accommodate high-temperature objects, they cannot allow temperature-variable objects to maintain infrared camouflage at all times in their environment. In this paper, a simple metamaterial structure is used to realize IR adaptive camouflage with a thermal switch.
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